Moves SimpleVectorOperation to its own class

src/main/java/net/knarcraft/stargate/portal/Portal.java

@@ -1,6 +1,6 @@
 package net.knarcraft.stargate.portal;
 
-import net.knarcraft.stargate.SimpleVectorOperation;
+import net.knarcraft.stargate.transformation.SimpleVectorOperation;
 import net.knarcraft.stargate.container.BlockLocation;
 import net.knarcraft.stargate.container.RelativeBlockVector;
 import net.knarcraft.stargate.portal.property.PortalLocation;

src/main/java/net/knarcraft/stargate/transformation/SimpleVectorOperation.java

@@ -1,4 +1,4 @@
-package net.knarcraft.stargate;
+package net.knarcraft.stargate.transformation;
 
 import org.bukkit.Axis;
 import org.bukkit.block.BlockFace;
@@ -32,7 +32,7 @@ public class SimpleVectorOperation {
      *
      * @param signFace <p>The sign face of a gate's sign</p>
      */
-    public SimpleVectorOperation(BlockFace signFace) {
+    public SimpleVectorOperation(@NotNull BlockFace signFace) {
         if (normalAxes.isEmpty()) {
             initializeIrisNormalAxes();
             initializeOperations();
@@ -47,6 +47,7 @@ public class SimpleVectorOperation {
      *
      * @return <p>The block face of a sign given upon instantiation</p>
      */
+    @NotNull
     public BlockFace getFacing() {
         return facing;
     }
@@ -58,6 +59,7 @@ public class SimpleVectorOperation {
      *
      * @return <p>The normal axis orthogonal to the opening plane</p>
      */
+    @NotNull
     public Axis getNormalAxis() {
         return normalAxis;
     }
@@ -77,6 +79,7 @@ public class SimpleVectorOperation {
      * @param vector <p>The vector to perform the operation on</p>
      * @return vector <p>A new vector with the operation applied</p>
      */
+    @NotNull
     public Vector performToAbstractSpaceOperation(@NotNull Vector vector) {
         Vector clone = vector.clone();
         clone.rotateAroundAxis(rotationAxes.get(facing), rotationAngles.get(facing));
@@ -92,6 +95,7 @@ public class SimpleVectorOperation {
      * @param vector <p>The vector to perform the inverse operation on</p>
      * @return vector <p>A new vector with the operation applied</p>
      */
+    @NotNull
     public Vector performToRealSpaceOperation(@NotNull Vector vector) {
         Vector clone = vector.clone();
         if (flipZAxis) {
@@ -106,6 +110,7 @@ public class SimpleVectorOperation {
      * @param vector <p>The vector to perform the inverse operation on</p>
      * @return vector <p>A new vector with the operation applied</p>
      */
+    @NotNull
     public BlockVector performToRealSpaceOperation(@NotNull BlockVector vector) {
         return performToRealSpaceOperation((Vector) vector).toBlockVector();
     }